I use the build in shortcuts settings a lot to launch my most used apps.
But some apps take longer to load, so I want to show a message to notify me the app is launching (when I takes some time, I tend to think I didn't press the correct shortcut).
This command works from the terminal but not when used as a shortcut: notify-send "Blender" "Launching..." && blender
If the command cannot run by itself in the terminal, a full path is required.
To avoid this, one must register the app in usr something directory (my memory fails...).
[edit]
I found it back sudo mv xxxxxx{app name} /usr/local/bin
Used the command like yours for the short key command, tried Frenchpress's and Aravisian's way with the permission and full path to the desktop file in /usr/share/application/, even tried it with at script leading the command to it and combining it with the short key. But sorry to say.......it just won't budge.